<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Title</title>
    <style>
      .box {
        display: block;
        font-size: 2em;
        margin: 0.67em 0;
      }
    </style>
  </head>
  <body>
    <h1>h1</h1>
    <div class="box">div</div>
    <span class="box">span</span>
    <p class="box">p</p>
  </body>
</html>
